linux-kernel - Re: [PATCH v5 1/2] net: dsa: mv88e6xxx: Don't forbid MDIO I/Os for PHY addr >= num_of

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Date:   Fri, 20 Jan 2017 01:06:45 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Cc:     Gregory CLEMENT <gregory.clement@...e-electrons.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Jason Cooper <jason@...edaemon.net>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        linux-arm-kernel@...ts.infradead.org,
        Nadav Haklai <nadavh@...vell.com>,
        Wilson Ding <dingwei@...vell.com>,
        Kostya Porotchkin <kostap@...vell.com>,
        Joe Zhou <shjzhou@...vell.com>,
        Jon Pannell <jpannell@...vell.com>
Subject: Re: [PATCH v5 1/2] net: dsa: mv88e6xxx: Don't forbid MDIO I/Os for
 PHY addr >= num_of_ports

On Thu, Jan 19, 2017 at 05:13:12PM -0500, Vivien Didelot wrote:
> Hi Gregory,
> 
> Gregory CLEMENT <gregory.clement@...e-electrons.com> writes:
> 
> > From: Romain Perier <romain.perier@...e-electrons.com>
> >
> > Some Marvell ethernet switches have internal ethernet transceivers with
> > hardcoded phy addresses. These addresses can be greater than the number
> > of ports or its value might be different than the associated port number.
> > This is for example the case for MV88E6341 that has 6 ports and internal
> > Port 1 to Port4 PHYs mapped at SMI addresses from 0x11 to 0x14.
> 
> Isn't there an hardware table used to map the PHY addresses on such chip?

The 6390 has something like this. But if we can avoid it, lets keep it
KISS.

	Andrew